Grid driving power supply system and method based on direct-current solid-state circuit breaker

Abstract

The invention relates to a grid driving power supply system and method based on a direct-current solid-state circuit breaker, and the system selects the direct-current solid-state circuit breaker as a driving power supply, uses a normally-on SiC JFET device as a main switch, and comprises an input module, a flyback converter module, an output module and a control module. The input module is used for converting an input alternating-current voltage into a direct-current voltage by utilizing a rectifying and filtering circuit; the flyback converter module is used for electrically isolating an input end and an output end based on a flyback converter, converting a direct-current voltage obtained by the input module into a voltage of a preset demand type, and outputting the voltage; the output module is used for performing direct current conversion on the output voltage of the flyback converter module to obtain the output voltage of the output module; the control module is used for receiving the output of the flyback converter module and the output module and carrying out double-closed-loop feedback to obtain a double-closed-loop duty ratio instruction; and adjusting the flyback converter module based on the double closed-loop duty cycle instruction.

Description

Technical Field

[0001] This application relates to the field of circuit breaking operations using DC solid-state circuit breakers, and mainly relates to a gate drive power supply system and method based on DC solid-state circuit breakers. Background Technology

[0002] Dual-carbon goals are driving the development of new energy sources in China, with DC power distribution systems attracting significant attention and corresponding DC relay protection equipment developing rapidly. With the continuous advancement of distributed energy and energy storage technologies, power distribution networks have transformed from traditional single-source structures to complex structures with multiple power sources and multiple terminals, leading to more diverse fault patterns in the power grid. Faults in DC systems mainly include phase-to-phase short circuits and ground faults, which can trigger huge short-circuit currents, thereby damaging switching devices.

[0003] While DC distribution networks offer advantages in efficiency and flexibility, their low system impedance leads to extremely rapid current acceleration and the absence of a natural zero-crossing point during short-circuit faults, making fault current interruption extremely difficult. Traditional mechanical circuit breakers, limited by their structure, typically have interruption times in the millisecond range, which is insufficient to meet the rapid fault protection requirements of DC distribution systems. In contrast, DC solid-state circuit breakers based on power electronic switches can achieve fault interruption times in the microsecond range, clearing fault currents without the need for moving parts. Furthermore, current DC solid-state circuit breakers often rely on external power supplies for their gate drive, which not only increases system complexity and cost but may also present power supply challenges in certain specialized applications.

[0004] For example, Chinese invention patent publication number "CN114256820A" discloses "A bidirectional DC solid-state circuit breaker based on SiC JFET", which specifically discloses "including a voltage detection circuit, a varistor (MOV), a buffer circuit, a silicon carbide junction field-effect transistor (SiC JFET), a gate drive circuit, and a microcontroller control circuit; the bidirectional DC solid-state circuit breaker uses two sets of SiC JFETs connected in common-source configuration as the main switching element; the switching element SiC JFET is connected to voltage detection circuits on both sides to detect short-circuit faults occurring on the source side or load side and promptly interrupt bidirectional current." However, this method is mainly for short-circuit fault protection of bidirectional DC circuits. It has poor applicability to AC circuits or other complex circuit environments, such as circuits containing harmonics, surges, and other special conditions. In addition, this method only focuses on short-circuit protection and does not involve voltage conversion functions, which cannot meet the needs of some application scenarios that require converting input voltage to different levels of output voltage. Summary of the Invention

[0005] To address the aforementioned problems in the prior art, this application provides a gate drive power supply system and method based on a DC solid-state circuit breaker.

[0006] The technical solution of this application is as follows:

[0007] On one hand, this invention proposes a gate drive power supply system based on a DC solid-state circuit breaker. The gate drive power supply system selects a DC solid-state circuit breaker as the drive power supply and utilizes a normally-on SiC JFET device as the main switch. It includes: an input module, a flyback converter module, an output module, and a control module.

[0008] The input module is used to convert the input AC voltage into DC voltage using a rectifier and filter circuit;

[0009] The flyback converter module provides electrical isolation between the input and output terminals based on the flyback converter, and converts the DC voltage obtained from the input module into a voltage of a preset required type for output.

[0010] The output module is used to convert the output voltage of the flyback converter module to DC to obtain the output voltage of the output module.

[0011] The control module is used to receive the outputs of the flyback converter module and the output module, perform dual closed-loop feedback, and obtain dual closed-loop duty cycle commands; and adjust the flyback converter module based on the dual closed-loop duty cycle commands.

[0012] Preferably, the input AC voltage is converted into DC voltage using a rectifier and filter circuit. Specifically, the ripple voltage of the input module is calculated based on the frequency of the input AC voltage, the rectifier and filter capacitor of the input module, and the load current. The ripple voltage is then combined with the input AC voltage to obtain the output DC voltage.

[0013] Preferably, the flyback converter module receives the DC voltage output from the input module, converts it, and outputs the converted voltage to the output module.

[0014] The flyback converter module also receives adjustment signals from the control module and provides current feedback to the control module.

[0015] Preferably, the output voltage of the flyback converter module is DC converted, and the conversion process includes rectification and filtering, wherein:

[0016] The rectification process specifically involves using a preset rectifier diode to rectify the output voltage of the flyback converter module to obtain the rectified voltage at the current moment.

[0017] The filtering process specifically involves using a preset filter capacitor to reduce ripple and obtain the output voltage of the output module.

[0018] Preferably, the control module includes a control chip, the input terminal of which is connected to a chip power supply circuit, a clock oscillation circuit, a current sampling circuit, and magnetic isolation; the output terminal of the control chip is connected to a flyback converter module.

[0019] The current sampling circuit receives current feedback from the flyback converter module, and the magnetic isolation receives voltage feedback from the output module.

[0020] Preferably, the dual closed-loop feedback includes an outer voltage loop and an inner current loop; the outer voltage loop specifically receives the converted flyback converter output voltage for voltage feedback; the inner current loop specifically receives the primary-side current of the flyback converter in the on-state for current feedback.

[0021] On the other hand, the present invention also proposes a gate drive power supply method based on a DC solid-state circuit breaker, the method comprising:

[0022] The input AC voltage is acquired, and the AC voltage is converted into DC voltage using a rectifier and filter circuit.

[0023] The flyback converter electrically isolates the input and output terminals of the gate drive power supply and converts the DC voltage into a voltage of a preset required type to obtain the flyback converter output voltage; the flyback converter output voltage is then DCized to obtain the converted flyback converter output voltage.

[0024] A pulse width modulation (PWM) control circuit is constructed, which performs dual closed-loop feedback to obtain dual closed-loop duty cycle commands. The dual closed-loop feedback includes an outer voltage loop and an inner current loop. Specifically, the outer voltage loop receives the converted output voltage of the flyback converter for voltage feedback. Specifically, the inner current loop receives the primary-side current of the flyback converter in the on-state for current feedback.

[0025] The flyback converter is adjusted based on the dual closed-loop duty cycle command.

[0026] Preferably, the flyback converter includes a power switch, a high-frequency transformer, and a power switch drive circuit; when the power switch is in the on state, the primary current at the current moment is obtained; when the power switch is in the off state, the output voltage of the flyback converter module is obtained.

[0027] In another aspect, the present invention also proposes an electronic device, including a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the program to implement a gate drive power supply method based on a DC solid-state circuit breaker as described in any embodiment of the present invention.

[0028] In another aspect, the present invention also proposes a computer-readable storage medium storing a computer program thereon, which, when executed by a processor, implements a gate drive power supply method based on a DC solid-state circuit breaker as described in any embodiment of the present invention.

[0029] Compared with the prior art, the present invention has the following beneficial effects:

[0030] 1) This invention provides a gate drive power supply system and method based on a DC solid-state circuit breaker. It uses a rectifier filter circuit to convert AC voltage into DC voltage, and then uses a flyback converter module to convert the voltage. This combination design optimizes the voltage conversion process, improves the voltage conversion efficiency from input to output, and more effectively converts the input electrical energy into the output electrical energy that meets the preset requirements.

[0031] 2) This invention provides a gate drive power supply system and method based on a DC solid-state circuit breaker. Based on a flyback converter, the input and output terminals are electrically isolated, which improves the safety of the circuit system, avoids electrical interference and leakage risks between the input and output terminals, enhances the stability of the entire circuit in complex electrical environments, and ensures the safety of downstream electrical equipment and operators.

[0032] 3) This invention provides a gate drive power supply system and method based on a DC solid-state circuit breaker. The control module receives the output voltage of the output module, performs dual closed-loop feedback to obtain a dual closed-loop duty cycle command, and adjusts the flyback converter module based on this command. This improves the control accuracy of the output voltage and enables the output to be adjusted quickly and accurately according to load changes and input voltage fluctuations, ensuring that the output voltage is always stable near the preset value, thus meeting the application requirements with stringent voltage accuracy requirements. Attached Figure Description

[0033] Figure 1 This is a system architecture diagram of an embodiment of the present invention;

[0034] Figure 2 This is a simulation waveform diagram of the gate drive power supply according to an embodiment of the present invention;

[0035] Figure 3 This is a simulation waveform diagram of a normally-on SiC JFET device with the gate drive power off according to an embodiment of the present invention. Detailed Implementation

[0036] The specific embodiments of the present invention are described below to enable those skilled in the art to understand the present invention. However, it should be understood that the present invention is not limited to the scope of the specific embodiments. For those skilled in the art, various changes are obvious as long as they are within the spirit and scope of the present invention as defined and determined by the appended claims. All inventions utilizing the concept of the present invention are protected.

[0037] This invention provides the following technical solution: a gate drive power supply system and method based on a DC solid-state circuit breaker.

[0038] Example 1:

[0039] See details Figure 1 This embodiment provides a gate drive power supply system based on a DC solid-state circuit breaker. The gate drive power supply system selects a DC solid-state circuit breaker as the drive power supply and utilizes a normally-on SiC JFET device as the main switch. Specific steps include: an input module, a flyback converter module, an output module, and a control module.

[0040] S1. The method further includes the ability of the normally-on SiC JFET device to remain on without a driving voltage; and the ability to turn off by simply applying a preset gate-source voltage when a turn-off is required.

[0041] In this embodiment, the normally-on SiC JFET device is model UJ3N120035K3S;

[0042] The gate drive power supply should also have the following functions:

[0043] The wide input voltage range specifically means that the input voltage of the drive power supply is not fixed, but will be adjusted according to the actual working scenario; when the input voltage fluctuates, it can stabilize the output voltage to adapt to different application requirements.

[0044] The microsecond-level startup capability is specifically because there are no other auxiliary power supplies in the circuit breaker. The drive power supply must be able to quickly draw voltage from the main power supply and convert it into a relatively stable low voltage output. This conversion process needs to be completed within a microsecond time.

[0045] Specifically, the electrical isolation between input and output means that the input terminal of the drive power supply is connected to the high-voltage side of the main circuit, while its low-voltage output terminal is connected to the gate and source terminals of the JFET. Strict electrical isolation must be performed between the input and output.

[0046] Specifically, closed-loop regulation of the output voltage is necessary because open-loop control cannot ensure output stability under wide input voltage conditions. If the output voltage is too high, it will damage the switching devices; if the output voltage is too low, it will not be able to reliably turn off the switching devices. The drive power supply must have closed-loop regulation capability for the output voltage.

[0047] S2. The input AC voltage is converted into DC voltage using a rectifier and filter circuit. Specifically, the ripple voltage of the input module is calculated based on the frequency of the input AC voltage, the rectifier and filter capacitor of the input module, and the load current. The ripple voltage is then combined with the input AC voltage to obtain the output DC voltage, expressed by the formula:

[0048]

[0049] V s,out =V DC +V ripple ;

[0050] In the formula, V DC Indicates the input AC voltage; V m Indicates the peak value of the input AC voltage; I load Indicates load current; f in Indicates the frequency of the input AC voltage; C in V represents the rectifier and filter capacitor of the input module; ripple,in Indicates the ripple voltage of the input module; V s,out This indicates the DC voltage output by the input module;

[0051] S3. The flyback converter module electrically isolates the input and output terminals based on the flyback converter, and converts the DC voltage obtained by the input module into a voltage of a preset required type for output.

[0052] The flyback converter module receives the DC voltage output from the input module, converts it, and outputs the converted voltage to the output module.

[0053] The flyback converter module also receives adjustment signals from the control module and provides current feedback to the control module.

[0054] Specifically, the electrical isolation involves energy transfer through magnetic coupling of a high-frequency transformer, with no direct conductive path between the primary and secondary windings, and physical isolation between the input and output circuits.

[0055] The flyback converter module is based on a flyback topology and includes a power switch, a high-frequency transformer, and a power switch drive circuit. When the power switch is in the ON state, the primary current at the current moment is obtained, expressed by the formula:

[0056]

[0057] In the formula, I p (t) represents the primary current at time t; L p V represents the primary inductance; s,out The input module outputs DC voltage; t represents time; T on Indicates the on-time of the power switch transistor;

[0058] When the power switch is in the off state, the output voltage of the flyback converter module is obtained, which can be expressed by the formula:

[0059]

[0060] In the formula, n represents the turns ratio of the secondary side to the primary side of the high-frequency transformer; V s D represents the secondary voltage of the high-frequency transformer; D represents the duty cycle; T represents the switching period of the power switch; I represents the secondary voltage of the high-frequency transformer. load V represents the load current. n,out This represents the output voltage of the flyback converter module;

[0061] S4. The output module is used to convert the output voltage of the flyback converter module to DC to obtain the output voltage of the output module. The conversion process includes rectification and filtering, wherein:

[0062] The rectification process specifically involves using preset rectifier diodes to rectify the output voltage of the flyback converter module, expressed by the following formula:

[0063] V rect (t)=|V n,out (t)|-V f ;

[0064] In the formula, V rect (t) represents the rectified voltage at time t; V n,out (t) represents the output voltage of the flyback converter module at time t; V f This indicates the preset forward voltage drop of the rectifier diode;

[0065] The filtering process specifically involves using a preset filter capacitor to reduce ripple and obtain the output voltage of the output module, expressed by the formula:

[0066]

[0067] V o,out =V ripple,out +V avg ;

[0068] In the formula, V avg V represents the average output voltage of the rectified voltage. ripple,outIndicates the ripple voltage of the output module; I load Indicates load current; f sw Indicates the switching frequency; C out R represents the rectifier and filter capacitor of the output module; R represents the capacitor and resistor; V o,out Indicates the output voltage of the output module;

[0069] S5. The control module is used to receive the outputs of the flyback converter module and the output module, perform dual closed-loop feedback, and obtain dual closed-loop duty cycle commands; and adjust the flyback converter module based on the dual closed-loop duty cycle commands.

[0070] S51. The control module includes a control chip of model UCC28C43. The input terminal of the control chip is connected to the chip power supply circuit, clock oscillation circuit, current sampling circuit and magnetic isolation; the output terminal of the control chip is connected to the flyback converter module.

[0071] The current sampling circuit receives current feedback from the flyback converter module, and the magnetic isolation receives voltage feedback from the output module.

[0072] The chip power supply circuit specifically provides a stable voltage, supports a wide input range and high-frequency operation, optimizes power consumption, and provides collaborative feedback control.

[0073] The current sampling circuit specifically monitors the inductor current in real time, adjusts the duty cycle of pulse width modulation to stabilize the output voltage, provides fast overcurrent protection, and filters to resist interference.

[0074] The clock oscillation circuit specifically generates a pulse width modulation clock signal by setting a frequency, and controls the timing of the switching transistors.

[0075] The magnetic isolation specifically employs a combination of an adjustable voltage regulator and an isolation element. The output voltage is sampled by a resistor divider through the adjustable voltage regulator circuit. The sampled voltage value is compared with the reference voltage pin of the TL431 to form a deviation signal. The deviation signal is then sent to the COMP pin in the control chip for analysis through magnetic isolation.

[0076] S52, the dual closed-loop feedback includes a voltage outer loop and a current inner loop, wherein:

[0077] The outer voltage loop specifically refers to the voltage feedback obtained by receiving the converted flyback converter output voltage through magnetic isolation, expressed by the following formula:

[0078] V fb =k v ·V o,out ;

[0079] e v =V ref -Vfb ;

[0080]

[0081] In the formula, V fb Indicates feedback voltage; k v Indicates the voltage division ratio; e v Indicates voltage error signal; V ref Indicates the preset reference voltage; D v This indicates the duty cycle command for the outer voltage loop output; K pv Indicates the preset voltage proportional gain; K iv Indicates the preset integral gain; t represents time; e v (t) represents the voltage error signal at time t;

[0082] The inner current loop specifically receives the primary-side current of the flyback converter module in the on-state state and performs current feedback through a current sampling circuit, expressed by the formula:

[0083] I fb =k i ·I p ;

[0084] I ref =D v ·I max ;

[0085] e i =I ref -I fb ;

[0086] D i =K pi ·e i ;

[0087] In the formula, I fb Indicates feedback current; k i Indicates the preset current sensor gain; I p I represents the primary current; ref Indicates the preset reference current; I max Indicates the maximum primary current; e i Indicates the current error signal; K pi Indicates the preset current proportional gain; D i This command indicates the duty cycle of the inner current loop output.

[0088] The dual closed-loop duty cycle command is obtained, expressed by the formula:

[0089] D fin =D v -D i ;

[0090] In the formula, D fin Indicates a dual-loop duty cycle command;

[0091] S6. In this embodiment, simulation experiments are performed on the gate drive power supply and the gate drive power supply off normally-on SiC JFET switching device, and the corresponding waveform changes are analyzed; please refer to Figure 2 , where u OUT Indicates the output voltage of the drive power supply, u GS-MOS U represents the voltage of the drive power supply switching transistor. RT / CT Indicates the voltage at the oscillator pin, u ISENSE This indicates the voltage at the current sensing pin, u. COMP This indicates the pin voltage of the error amplifier, u. K This represents the cathode voltage of the TL431, V. ref VDD represents the reference voltage, and VDD represents the power supply pin voltage of the control chip.

[0092] Starting from time zero, where time zero is the instant the gate drive power supply is energized, V at time t1 OUT The voltage is 15V, and the time interval is 15µs, where t1 represents the first moment; when V GS-MOS When the voltage rises to 8.4V, VREF is 5V, indicating that the control chip has entered normal working state;

[0093] During the time interval [t2, t3], V OUT The voltage is less than 15V, causing the TL431 to be in the off state, where t2 represents the second time step and t3 represents the third time step; at this time, V K With V OUT The waveform remains consistent, and no current flows through the magnetically isolated internal coil. V COMP High potential;

[0094] When the power switch is in the on state, V ISENSE There is voltage only when the primary current is converted into a voltage value exceeding the set value of 1V. When the voltage value converted into the primary current exceeds the set value of 1V, the control chip starts the current feedback mode and shuts off the pulse width modulation signal. The switching transistor is immediately turned off, and the output voltage rises. At this point, a complete voltage and current feedback operation is completed.

[0095] Please see Figure 3 , where i DS U represents the current flowing through the SiC JFET switching device; in Indicates the input voltage of the drive power supply;

[0096] At time t4, the gate drive power supply system of the DC solid-state circuit breaker is in normal operation, where t4 represents the fourth time point; during the time interval [t4, t5], the gate drive power supply system fails, at which point i DSIt generates high-amplitude, high-transient fault currents with a time interval of 5µs.

[0097] During the time interval [t5, t6], after t6-t5 = 15us, the short-circuit fault current was successfully cleared, proving the feasibility of turning off the gate-driven power supply-type SiC JFET switching device.

[0098] Example 2:

[0099] This embodiment provides a gate drive power supply method based on a DC solid-state circuit breaker, the method comprising:

[0100] The input AC voltage is acquired, and the AC voltage is converted into DC voltage using a rectifier and filter circuit.

[0101] The flyback converter electrically isolates the input and output terminals of the gate drive power supply and converts the DC voltage into a voltage of a preset required type to obtain the flyback converter output voltage. The flyback converter output voltage is then DC-converted to obtain the converted flyback converter output voltage. The flyback converter includes a power switch, a high-frequency transformer, and a power switch drive circuit. When the power switch is in the on state, the primary current at the current moment is obtained; when the power switch is in the off state, the output voltage of the flyback converter module is obtained.

[0102] A pulse width modulation (PWM) control circuit is constructed, which performs dual closed-loop feedback to obtain dual closed-loop duty cycle commands. The dual closed-loop feedback includes an outer voltage loop and an inner current loop. Specifically, the outer voltage loop receives the converted output voltage of the flyback converter for voltage feedback. Specifically, the inner current loop receives the primary-side current of the flyback converter in the on-state for current feedback.

[0103] The flyback converter is adjusted based on the dual closed-loop duty cycle command.

[0104] Example 3:

[0105] This embodiment provides an electronic device, including a memory, a processor, and a computer program stored in the memory and executable on the processor. When the processor executes the program, it implements a gate drive power supply method based on a DC solid-state circuit breaker as described in any embodiment of the present invention.

[0106] Example 4:

[0107] This embodiment provides a computer-readable storage medium storing a computer program that, when executed by a processor, implements a gate drive power supply method based on a DC solid-state circuit breaker as described in any embodiment of the present invention.

[0108] It is worth noting that the system, electronic device, and computer-readable storage medium described in this invention are all based on the same principle as the method described in Embodiment 1, and will not be repeated here.

[0109] The above description is merely an embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural or procedural transformations made based on the content of the present invention's specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of the present invention.

Claims

1. A gate drive power supply system based on a DC solid-state circuit breaker, characterized in that, The gate drive power supply system selects a DC solid-state circuit breaker as the drive power supply and uses a normally-on SiC JFET device as the main switch, including: an input module, a flyback converter module, an output module, and a control module. The input module is used to convert the input AC voltage into DC voltage using a rectifier and filter circuit; The flyback converter module provides electrical isolation between the input and output terminals based on the flyback converter, and converts the DC voltage obtained from the input module into a voltage of a preset required type for output. The output module is used to convert the output voltage of the flyback converter module to DC to obtain the output voltage of the output module. The control module is used to receive the outputs of the flyback converter module and the output module, perform dual closed-loop feedback, and obtain dual closed-loop duty cycle commands; and adjust the flyback converter module based on the dual closed-loop duty cycle commands.

2. The gate drive power supply system based on a DC solid-state circuit breaker according to claim 1, characterized in that, The input AC voltage is converted into DC voltage using a rectifier and filter circuit. Specifically, the ripple voltage of the input module is calculated based on the frequency of the input AC voltage, the rectifier and filter capacitor of the input module, and the load current. The ripple voltage is then combined with the input AC voltage to obtain the output DC voltage.

3. The gate drive power supply system based on a DC solid-state circuit breaker according to claim 1, characterized in that, The flyback converter module receives the DC voltage output from the input module, converts it, and outputs the converted voltage to the output module. The flyback converter module also receives adjustment signals from the control module and provides current feedback to the control module.

4. The gate drive power supply system based on a DC solid-state circuit breaker according to claim 1, characterized in that, The output voltage of the flyback converter module is converted to DC. The conversion process includes rectification and filtering, wherein: The rectification process specifically involves using a preset rectifier diode to rectify the output voltage of the flyback converter module to obtain the rectified voltage at the current moment. The filtering process specifically involves using a preset filter capacitor to reduce ripple and obtain the output voltage of the output module.

5. The gate drive power supply system based on a DC solid-state circuit breaker according to claim 1, characterized in that, The control module includes a control chip, the input of which is connected to a chip power supply circuit, a clock oscillation circuit, a current sampling circuit, and magnetic isolation; the output of the control chip is connected to a flyback converter module. The current sampling circuit receives current feedback from the flyback converter module, and the magnetic isolation receives voltage feedback from the output module.

6. The gate drive power supply system based on a DC solid-state circuit breaker according to claim 1, characterized in that, The dual closed-loop feedback includes an outer voltage loop and an inner current loop; the outer voltage loop specifically receives the converted output voltage of the flyback converter for voltage feedback; the inner current loop specifically receives the primary-side current of the flyback converter in the on-state for current feedback.

7. A gate drive power supply method based on a DC solid-state circuit breaker, characterized in that, The method includes: The input AC voltage is acquired, and the AC voltage is converted into DC voltage using a rectifier and filter circuit. The flyback converter electrically isolates the input and output terminals of the gate drive power supply and converts the DC voltage into a voltage of a preset required type to obtain the flyback converter output voltage; the flyback converter output voltage is then DCized to obtain the converted flyback converter output voltage. A pulse width modulation (PWM) control circuit is constructed, which performs dual closed-loop feedback to obtain dual closed-loop duty cycle commands. The dual closed-loop feedback includes an outer voltage loop and an inner current loop. Specifically, the outer voltage loop receives the converted output voltage of the flyback converter for voltage feedback. Specifically, the inner current loop receives the primary-side current of the flyback converter in the on-state for current feedback. The flyback converter is adjusted based on the dual closed-loop duty cycle command.

8. The gate drive power supply method based on a DC solid-state circuit breaker according to claim 7, characterized in that, The flyback converter includes a power switch, a high-frequency transformer, and a power switch drive circuit; when the power switch is in the on state, the primary current at the current moment is obtained; when the power switch is in the off state, the output voltage of the flyback converter module is obtained.

9. An electronic device comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that, When the processor executes the program, it implements the gate drive power supply method based on a DC solid-state circuit breaker as described in claim 7.

10. A computer-readable storage medium having a computer program stored thereon, characterized in that, When the program is executed by the processor, it implements the gate drive power supply method based on a DC solid-state circuit breaker as described in claim 7.

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